Mitsubishi 4G1 series

4G1 ENGINE (E-W) -
Specifications
11A-1-2
PWEE9520
E
Nov. 1995Mitsubishi Motors Corporation
Item LimitStandard
Valve stem-to-guide SOHC 12-VALVE
Intake 0.020- 0.050 0.10
clearance mm
Exhaust 0.035- 0.050 0.15
SOHC 16-VALVE
Intake 0.020 - 0.047 0.10
Exhaust 0.030 - 0.057 0.15
DOHC
Intake 0.020- 0.047 0.10
Exhaust 0.030- 0.062 0.15
Valve face angle 45
°
- 45.5
°
-
Valve stem projec- SOHC 12-VALVE
Intake 43.70 44.20
tion mm
Exhaust 43.30 43.80
SOHC 16-VALVE
Intake 53.21 53.71
Exhaust 54.10 54.60
DOHC
Intake 48.80 49.30
Exhaust 48.70 49.20
Overall valve length SOHC 12-VALVE
Intake 100.75 100.25
mm
Exhaust 101.05 105.55
SOHC 16-VALVE
Intake 111.56 111.06
Exhaust 114.71 114.21
DOHC
Intake 106.35 105.85
Exhaust 106.85 106.35
Valve spring free SOHC 12-VALVE
Intake 46.1 45.6
height mm
Exhaust 46.8 46.3
SOHC 16-VALVE 50.9 50.4
DOHC 49.1 48.6
Valve spring load/ SOHC 12-VALVE
Intake 226/40.0 -
installed height N/
mm
Exhaust 284/39.6 -
mm
SOHC 16-VALVE 216/44.2 -
DOHC 177/40.0 -
Valve spring squareness 2
°
4
°
Valve seat contact width mm 0.9- 1.3 -
Valve guide internal diameter mm
SOHC 12-VALVE 6.6 -
SOHC 16-VALVE 5.5 -
DOHC 5.5 -
Valve guide projection mm
SOHC 12-VALVE 17.0 -
SOHC 16-VALVE 23.0 -
DOHC 23.0 -
Oil pump and oil pan
Oil pump tip clearance mm 0.06- 0.18 -
Oil pump side clearance mm 0.04 - 0.10 -
Oil pump body clearance mm 0.10- 0.18 0.35
PWEE9520-C
E
Apr. 2000Mitsubishi Motors Corporation Revised